Don't believe everything you see on Facebook. A photo of a $100 off Publix coupon made the rounds on social media this weekend, but the grocery store chain says the coupon is fake. The counterfeit coupon was for $100 off a purchase of $120 or more. "This is not supported by Publix and this coupon is not valid at any of our locations," said Publix spokesman Brian West. "We recommend not participating in the promotion or providing your personal information." Publix plans to investigate the situation further, West said. The offer was originally posted by go-saves.com, a website that is no longer functioning.